TWO Annual report pursuant to Section 13 and 15(d)

Available-for-Sale Securities, Weighted Average Life Classifications (Details)

v3.19.1

Available-for-Sale Securities, Weighted Average Life Classifications (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Less than or equal to 1 year	$ 104,256
Greater than 1 year and less than or equal to 3 years	259,578
Greater than 3 years and less than or equal to 5 years	689,737
Greater than 5 years and less than or equal to 10 years	22,133,662
Greater than 10 years	2,365,371
Available-for-sale securities, at fair value	25,552,604	$ 21,220,819
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Less than or equal to 1 year	6,301
Greater than 1 year and less than or equal to 3 years	124,121
Greater than 3 years and less than or equal to 5 years	260,886
Greater than 5 years and less than or equal to 10 years	19,550,827
Greater than 10 years	1,742,898
Available-for-sale securities, at fair value	21,685,033	18,238,725
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Less than or equal to 1 year	97,955
Greater than 1 year and less than or equal to 3 years	135,457
Greater than 3 years and less than or equal to 5 years	428,851
Greater than 5 years and less than or equal to 10 years	2,582,835
Greater than 10 years	622,473
Available-for-sale securities, at fair value	$ 3,867,571	$ 2,982,094

- Definition

Fair value of available-for-sale debt securities maturing in the second fiscal year through the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

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- Definition

Fair value of available-for-sale debt securities maturing in the fourth fiscal year through the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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