Securities (Tables)

3 Months Ended

Mar. 31, 2019

Debt and Equity Securities, FV-NI [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 debt securities at March 31, 2019 and December 31, 2018.

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

Debt Securities Available for Sale	March 31, 2019
	Amortized Cost		Gross Unrealized				Fair Value
(In Millions)			Gains		Losses
U.S. Government	$	5,030.0	$	19.0	$	27.0	$	5,022.0
Obligations of States and Political Subdivisions	755.8		10.7		1.7		764.8
Government Sponsored Agency	22,624.9		68.3		124.6		22,568.6
Non-U.S. Government	143.3		—		0.6		142.7
Corporate Debt	2,297.6		10.2		14.1		2,293.7
Covered Bonds	837.4		2.6		2.6		837.4
Sub-Sovereign, Supranational and Non-U.S. Agency Bonds	2,214.0		24.3		2.2		2,236.1
Other Asset-Backed	2,530.5		3.3		13.6		2,520.2
Commercial Mortgage-Backed	647.6		12.5		2.0		658.1
Other	14.6		—		—		14.6
Total	$	37,095.7	$	150.9	$	188.4	$	37,058.2

Debt Securities Available for Sale	December 31, 2018
	Amortized Cost		Gross Unrealized				Fair Value
(In Millions)			Gains		Losses
U.S. Government	$	5,203.1	$	21.8	$	39.6	$	5,185.3
Obligations of States and Political Subdivisions	657.6		2.0		3.7		655.9
Government Sponsored Agency	22,522.7		52.4		150.5		22,424.6
Non-U.S. Government	143.3		—		1.1		142.2
Corporate Debt	2,312.6		3.2		21.1		2,294.7
Covered Bonds	832.7		1.4		4.8		829.3
Sub-Sovereign, Supranational and Non-U.S. Agency Bonds	2,087.8		11.9		3.5		2,096.2
Other Asset-Backed	2,678.9		1.7		22.9		2,657.7
Commercial Mortgage-Backed	587.4		4.0		4.2		587.2
Other	15.7		—		—		15.7
Total	$	37,041.8	$	98.4	$	251.4	$	36,888.8

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

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

Debt Securities Held to Maturity	March 31, 2019
	Amortized Cost		Gross Unrealized				Fair Value
(In Millions)			Gains		Losses
U.S Government	$	119.6	$	—	$	—	$	119.6
Obligations of States and Political Subdivisions	16.0		0.6		—		16.6
Government Sponsored Agency	4.3		0.2		—		4.5
Corporate Debt	451.6		0.4		0.3		451.7
Covered Bonds	2,617.8		15.5		4.8		2,628.5
Non-U.S. Government	4,338.1		4.7		5.0		4,337.8
Certificates of Deposit	75.8		—		—		75.8
Sub-Sovereign, Supranational and Non-U.S. Agency Bonds	3,170.2		13.5		4.6		3,179.1
Other Asset-Backed	1,099.6		0.3		1.2		1,098.7
Other	250.0		—		64.6		185.4
Total	$	12,143.0	$	35.2	$	80.5	$	12,097.7

Debt Securities Held to Maturity	December 31, 2018
	Amortized Cost		Gross Unrealized				Fair Value
(In Millions)			Gains		Losses
U.S Government	$	101.6	$	—	$	—	$	101.6
Obligations of States and Political Subdivisions	18.9		0.6		—		19.5
Government Sponsored Agency	4.5		0.2		—		4.7
Corporate Debt	472.9		0.4		1.8		471.5
Covered Bonds	2,877.6		9.6		9.3		2,877.9
Non-U.S. Government	6,488.2		2.1		8.7		6,481.6
Certificates of Deposit	45.1		—		—		45.1
Sub-Sovereign, Supranational and Non-U.S. Agency Bonds	2,966.8		5.8		12.3		2,960.3
Other Asset-Backed	1,146.4		—		4.0		1,142.4
Other	232.0		—		69.6		162.4
Total	$	14,354.0	$	18.7	$	105.7	$	14,267.0

Debt Securities with Unrealized Losses

The following table provides information regarding debt 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, 2019 and December 31, 2018.

Table 40: Debt Securities with Unrealized Losses

Debt Securities with Unrealized Losses as of March 31, 2019	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	$	—	$	—	$	2,674.5	$	27.0	$	2,674.5	$	27.0
Obligations of States and Political Subdivisions	66.2		1.2		209.8		0.5		276.0		1.7
Government Sponsored Agency	6,933.4		31.9		8,371.6		92.7		15,305.0		124.6
Non-U.S. Government	2,321.8		0.1		1,259.6		5.5		3,581.4		5.6
Corporate Debt	339.3		0.9		1,009.1		13.5		1,348.4		14.4
Covered Bonds	181.0		0.3		1,022.9		7.1		1,203.9		7.4
Sub-Sovereign, Supranational and Non-U.S. Agency Bonds	253.4		0.6		1,501.8		6.2		1,755.2		6.8
Other Asset-Backed	1,436.5		8.7		893.8		6.1		2,330.3		14.8
Commercial Mortgage-Backed	18.7		0.1		193.5		1.9		212.2		2.0
Other	60.7		19.8		125.8		44.8		186.5		64.6
Total	$	11,611.0	$	63.6	$	17,262.4	$	205.3	$	28,873.4	$	268.9

Debt Securities with Unrealized Losses as of December 31, 2018	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	$	—	$	—	$	2,862.0	$	39.6	$	2,862.0	$	39.6
Obligations of States and Political Subdivisions	169.6		2.4		279.6		1.3		449.2		3.7
Government Sponsored Agency	8,368.8		33.5		6,822.4		117.0		15,191.2		150.5
Non-U.S. Government	5,065.2		0.8		1,274.0		9.0		6,339.2		9.8
Corporate Debt	712.7		4.1		1,097.4		18.8		1,810.1		22.9
Covered Bonds	646.4		3.7		696.9		10.4		1,343.3		14.1
Sub-Sovereign, Supranational and Non-U.S. Agency Bonds	1,105.0		4.6		1,189.2		11.2		2,294.2		15.8
Other Asset-Backed	2,507.8		15.9		954.9		11.0		3,462.7		26.9
Commercial Mortgage-Backed	22.8		0.1		274.4		4.1		297.2		4.2
Other	50.5		18.8		112.6		50.8		163.1		69.6
Total	$	18,648.8	$	83.9	$	15,563.4	$	273.2	$	34,212.2	$	357.1

Cumulative Credit-Related Losses on Debt 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 Debt Securities

	Three Months Ended March 31,
(In Millions)	2019		2018
Cumulative Credit-Related Losses on Debt Securities Held — Beginning of Period	$	4.1	$	3.6
Plus: Losses on Newly Identified Impairments	—		0.2
Additional Losses on Previously Identified Impairments	—		—
Less: Current and Prior Period Losses on Debt Securities Sold During the Period	—		—
Cumulative Credit-Related Losses on Debt Securities Held — End of Period	$	4.1	$	3.8

Available for Sale Debt Securities

Debt and Equity Securities, FV-NI [Line Items]

Remaining Maturity of Securities Available for Sale and Held to Maturity

The following table provides the remaining maturity of debt securities as of March 31, 2019.

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

	March 31, 2019
(In Millions)	Amortized Cost		Fair Value
Available for Sale
Due in One Year or Less	$	9,967.0	$	9,950.6
Due After One Year Through Five Years	19,376.6		19,379.5
Due After Five Years Through Ten Years	6,790.3		6,771.8
Due After Ten Years	961.8		956.3
Total	37,095.7		37,058.2
Held to Maturity
Due in One Year or Less	4,820.9		4,820.7
Due After One Year Through Five Years	6,787.3		6,795.4
Due After Five Years Through Ten Years	452.5		440.4
Due After Ten Years	82.3		41.2
Total	$	12,143.0	$	12,097.7

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