Securities (Tables)

3 Months Ended

Mar. 31, 2017

Schedule of Trading Securities and Other Trading Assets [Line Items]

Reconciliation of Amortized Cost to Fair Value of Securities Available for Sale

The following tables provide the amortized cost and fair values of securities at March 31, 2017 and December 31, 2016.

Table 37: Reconciliation of Amortized Cost to Fair Value of Securities Available for Sale

Securities Available for Sale	March 31, 2017
	Amortized Cost		Gross Unrealized				Fair Value
(In Millions)			Gains		Losses
U.S. Government	$	6,815.5	$	27.9	$	13.2	$	6,830.2
Obligations of States and Political Subdivisions	953.2		0.2		1.9		951.5
Government Sponsored Agency	17,947.4		52.6		63.6		17,936.4
Non-U.S. Government	219.8		—		1.7		218.1
Corporate Debt	3,578.0		3.6		22.6		3,559.0
Covered Bonds	887.3		1.1		3.5		884.9
Sub-Sovereign, Supranational and Non-U.S. Agency Bonds	1,761.0		3.1		2.8		1,761.3
Other Asset-Backed	2,349.0		4.4		1.5		2,351.9
Auction Rate	4.6		—		0.3		4.3
Commercial Mortgage-Backed	459.1		—		2.9		456.2
Other	43.8		—		—		43.8
Total	$	35,018.7	$	92.9	$	114.0	$	34,997.6

Securities Available for Sale	December 31, 2016
	Amortized Cost		Gross Unrealized				Fair Value
(In Millions)			Gains		Losses
U.S. Government	$	7,514.5	$	22.4	$	14.3	$	7,522.6
Obligations of States and Political Subdivisions	890.8		—		5.6		885.2
Government Sponsored Agency	17,914.1		49.3		70.6		17,892.8
Non-U.S. Government	420.0		—		2.1		417.9
Corporate Debt	3,787.4		2.6		24.8		3,765.2
Covered Bonds	1,148.6		0.8		5.5		1,143.9
Sub-Sovereign, Supranational and Non-U.S. Agency Bonds	1,343.6		0.9		3.8		1,340.7
Other Asset-Backed	2,083.7		2.7		1.3		2,085.1
Auction Rate	5.0		—		0.3		4.7
Commercial Mortgage-Backed	474.1		—		2.5		471.6
Other	50.1		—		—		50.1
Total	$	35,631.9	$	78.7	$	130.8	$	35,579.8

Reconciliation of Amortized Cost to Fair Values of Securities Held to Maturity

Table 38: Reconciliation of Amortized Cost to Fair Value of Securities Held to Maturity

Securities Held to Maturity	March 31, 2017
	Amortized Cost		Gross Unrealized				Fair Value
(In Millions)			Gains		Losses
U.S Government	$	6.0	$	—	$	—	$	6.0
Obligations of States and Political Subdivisions	49.0		2.6		—		51.6
Government Sponsored Agency	6.8		0.5		—		7.3
Corporate Debt	252.6		0.1		0.4		252.3
Covered Bonds	2,295.6		11.6		2.7		2,304.5
Non-U.S. Government	3,282.6		6.6		0.4		3,288.8
Certificates of Deposit	306.5		—		—		306.5
Sub-Sovereign, Supranational and Non-U.S. Agency Bonds	2,422.3		10.8		1.3		2,431.8
Other Asset-Backed	186.4		1.6		—		188.0
Other	130.6		—		34.0		96.6
Total	$	8,938.4	$	33.8	$	38.8	$	8,933.4

Securities Held to Maturity	December 31, 2016
	Amortized Cost		Gross Unrealized				Fair Value
(In Millions)			Gains		Losses
U.S Government	$	15.0	$	—	$	—	$	15.0
Obligations of States and Political Subdivisions	63.6		2.7		—		66.3
Government Sponsored Agency	7.4		0.5		—		7.9
Corporate Debt	231.2		0.2		0.4		231.0
Covered Bonds	2,051.6		10.1		3.7		2,058.0
Non-U.S. Government	3,517.5		4.9		2.3		3,520.1
Certificates of Deposit	606.0		0.2		0.1		606.1
Sub-Sovereign, Supranational and Non-U.S. Agency Bonds	2,154.7		10.5		2.8		2,162.4
Other Asset-Backed	143.4		0.1		—		143.5
Other	130.7		—		35.9		94.8
Total	$	8,921.1	$	29.2	$	45.2	$	8,905.1

Securities Continuous Unrealized Loss Position

The following tables provide information regarding securities that had been in a continuous unrealized loss position for less than twelve months and for twelve months or longer as of March 31, 2017 and December 31, 2016.

Table 40: Securities with Unrealized Losses

Securities with Unrealized Losses as of March 31, 2017	Less than 12 Months				12 Months or Longer				Total
(In Millions)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Government	$	1,701.3	$	13.2	$	—	$	—	$	1,701.3	$	13.2
Obligations of States and Political Subdivisions	750.1		1.9		—		—		750.1		1.9
Government Sponsored Agency	7,455.5		51.5		2,433.8		12.1		9,889.3		63.6
Non-U.S. Government	1,729.3		2.1		—		—		1,729.3		2.1
Corporate Debt	1,555.2		9.6		807.3		13.4		2,362.5		23.0
Covered Bonds	829.3		6.0		139.2		0.2		968.5		6.2
Sub-Sovereign, Supranational and Non-U.S. Agency Bonds	1,089.2		3.4		249.3		0.7		1,338.5		4.1
Other Asset-Backed	714.5		1.5		—		—		714.5		1.5
Auction Rate	0.4		0.1		3.8		0.2		4.2		0.3
Commercial Mortgage-Backed	439.3		2.9		—		—		439.3		2.9
Other	48.4		14.1		51.6		19.9		100.0		34.0
Total	$	16,312.5	$	106.3	$	3,685.0	$	46.5	$	19,997.5	$	152.8

Securities with Unrealized Losses as of December 31, 2016	Less than 12 Months				12 Months or Longer				Total
(In Millions)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Government	$	1,603.0	$	14.3	$	—	$	—	$	1,603.0	$	14.3
Obligations of States and Political Subdivisions	865.3		5.6		—		—		865.3		5.6
Government Sponsored Agency	8,252.5		58.5		2,121.0		12.1		10,373.5		70.6
Non-U.S. Government	2,957.1		4.4		—		—		2,957.1		4.4
Corporate Debt	1,601.7		11.2		1,054.4		14.0		2,656.1		25.2
Covered Bonds	809.0		8.6		138.9		0.6		947.9		9.2
Sub-Sovereign, Supranational and Non-U.S. Agency Bonds	1,136.1		5.7		249.1		0.9		1,385.2		6.6
Other Asset-Backed	584.3		1.3		—		—		584.3		1.3
Certificates of Deposit	81.4		0.1		—		—		81.4		0.1
Auction Rate	0.4		0.1		4.3		0.2		4.7		0.3
Commercial Mortgage-Backed	471.5		2.5		—		—		471.5		2.5
Other	50.5		17.9		59.7		18.0		110.2		35.9
Total	$	18,412.8	$	130.2	$	3,627.4	$	45.8	$	22,040.2	$	176.0

Credit Related Impairment Losses Recognized in Earnings on Other Than Temporarily Impaired Securities

The table below provides the cumulative credit-related losses recognized in earnings on debt securities other-than-temporarily impaired.

Table 41: Cumulative Credit-Related Losses on Securities

	Three Months Ended March 31,
(In Millions)	2017		2016
Cumulative Credit-Related Losses on Securities Held — Beginning of Period	$	3.4	$	5.2
Plus: Losses on Newly Identified Impairments	—		—
Additional Losses on Previously Identified Impairments	0.1		—
Less: Current and Prior Period Losses on Securities Sold During the Period	—		—
Cumulative Credit-Related Losses on Securities Held — End of Period	$	3.5	$	5.2

Available for Sale Investment Securities

Schedule of Trading Securities and Other Trading Assets [Line Items]

Remaining Maturity of Securities

The following table provides the remaining maturity of securities as of March 31, 2017.

Table 39: Remaining Maturity of Securities Available for Sale and Held to Maturity

	March 31, 2017
(In Millions)	Amortized Cost		Fair Value
Available for Sale
Due in One Year or Less	$	6,665.1	$	6,660.1
Due After One Year Through Five Years	21,136.2		21,124.3
Due After Five Years Through Ten Years	6,015.5		6,017.7
Due After Ten Years	1,201.9		1,195.5
Total	35,018.7		34,997.6
Held to Maturity
Due in One Year or Less	2,914.6		2,916.9
Due After One Year Through Five Years	5,764.1		5,783.4
Due After Five Years Through Ten Years	201.2		200.2
Due After Ten Years	58.5		32.9
Total	$	8,938.4	$	8,933.4

Note: Mortgage-backed and asset-backed securities are included in the above table taking into account anticipated future prepayments.

Held-to-maturity Securities

Schedule of Trading Securities and Other Trading Assets [Line Items]

Remaining Maturity of Securities

The following table provides the remaining maturity of securities as of March 31, 2017.

Table 39: Remaining Maturity of Securities Available for Sale and Held to Maturity

	March 31, 2017
(In Millions)	Amortized Cost		Fair Value
Available for Sale
Due in One Year or Less	$	6,665.1	$	6,660.1
Due After One Year Through Five Years	21,136.2		21,124.3
Due After Five Years Through Ten Years	6,015.5		6,017.7
Due After Ten Years	1,201.9		1,195.5
Total	35,018.7		34,997.6
Held to Maturity
Due in One Year or Less	2,914.6		2,916.9
Due After One Year Through Five Years	5,764.1		5,783.4
Due After Five Years Through Ten Years	201.2		200.2
Due After Ten Years	58.5		32.9
Total	$	8,938.4	$	8,933.4

Note: Mortgage-backed and asset-backed securities are included in the above table taking into account anticipated future prepayments.