Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2015

Long-term Debt, Unclassified [Abstract]

Schedule of Long-term Debt

As of December 31,	2015		2014
(In millions)
Statutory business trusts:
Floating-rate subordinated notes due to State Street Capital Trust IV in 2037	$	800	$	800
Floating-rate subordinated notes due to State Street Capital Trust I in 2028	155		155
Parent company and non-banking subsidiary issuances:
3.55% notes due 2025 (1)	1,307		—
2.55% notes due 2020(1)	1,199		—
3.70% notes due in 2023(1)	1,050		1,043
3.30% notes due 2024(1)	1,013		999
2.875% notes due 2016	1,001		1,005
3.10% subordinated notes due 2023(1)	997		983
4.375% notes due 2021(1)	740		730
4.956% junior subordinated debentures due 2018(1)	519		528
Floating-rate notes due 2020	500		—
1.35% notes due 2018(1)	496		492
5.375% notes due 2017(1)	449		450
Long-term capital leases	334		769
7.35% notes due 2026	150		150
State Street Bank issuances:
Floating-rate extendible notes due 2016	—		900
5.25% subordinated notes due 2018	424		433
5.30% subordinated notes due 2016	400		405
Floating-rate subordinated notes due 2015	—		200
Total long-term debt	$	11,534	$	10,042

⁽¹⁾  We have entered into interest-rate swap agreements, recorded as fair value hedges, to modify our interest expense on these senior and subordinated notes from a fixed rate to a floating rate. As of December 31, 2015, the carrying value of long-term debt associated with these fair value hedges increased $105 million. As of December 31, 2014, the carrying value of long-term debt associated with these fair value hedges increased $76 million. Refer to Note 10 for additional information about fair value hedges.