TWO Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities Schedule of Interest Rate Swap Receivers (Details)

Derivative Instruments and Hedging Activities Schedule of Interest Rate Swap Receivers (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional	$ 58,777,783,000	$ 36,528,169,000	$ 18,429,288,000	$ 31,226,878,000
Interest Rate Swap [Member] \| Short [Member]
Derivative [Line Items]
Notional	$ 10,542,671,000	$ 8,117,438,000
Weighted Average Variable Interest Rate	2.707%	2.612%
Weighted Average Fixed Interest Rate	2.737%	2.757%
Weighted Average Remaining Maturity	6 years 1 month 6 days	5 years 2 months 19 days
Interest Rate Swap [Member] \| Derivative Maturity Over One And Within Two Years From Balance Sheet Date [Member] \| Short [Member]
Derivative [Line Items]
Notional	$ 250,000,000	$ 250,000,000
Weighted Average Variable Interest Rate	2.776%	2.469%
Weighted Average Fixed Interest Rate	2.258%	2.258%
Weighted Average Remaining Maturity	24 days	1 year 21 days
Interest Rate Swap [Member] \| Derivative Maturity Over Two And Within Three Years From Balance Sheet Date [Member] \| Short [Member]
Derivative [Line Items]
Notional	$ 2,477,438,000	$ 2,477,438,000
Weighted Average Variable Interest Rate	2.755%	2.538%
Weighted Average Fixed Interest Rate	2.736%	2.736%
Weighted Average Remaining Maturity	1 year 11 months 26 days	2 years 2 months 26 days
Interest Rate Swap [Member] \| Derivative Maturity Over Three And Within Four Years From Balance Sheet Date [Member] \| Short [Member]
Derivative [Line Items]
Notional	$ 800,000,000	$ 800,000,000
Weighted Average Variable Interest Rate	2.663%	2.653%
Weighted Average Fixed Interest Rate	2.975%	2.975%
Weighted Average Remaining Maturity	3 years 1 month 20 days	3 years 4 months 20 days
Interest Rate Swap [Member] \| Derivative Maturity Over Four Years From Balance Sheet Date [Member] \| Short [Member]
Derivative [Line Items]
Notional	$ 7,015,233,000	$ 4,590,000,000
Weighted Average Variable Interest Rate	2.692%	2.653%
Weighted Average Fixed Interest Rate	2.728%	2.757%
Weighted Average Remaining Maturity	8 years 25 days	7 years 4 months 13 days