Debt And Shareholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, shares in Thousands

3 Months Ended

Jun. 30, 2017

Mar. 31, 2017

Mar. 31, 2016

Dec. 31, 2016

Dec. 31, 2015

Debt And Shareholders' Equity [Line Items]

Schedule of Long-term Debt Instruments [Table Text Block]

Long-term debt is summarized as follows:

(In millions)	March 31, 2017		December 31, 2016
Subordinated notes	$	247	$	247
Senior notes	135		287
Capital lease obligations	1		1
Total	$	383	$	535

Subordinated Debt

$ 247,000,000

$ 247,000,000

Other Comprehensive Income (Loss), before Reclassifications, Net of Tax

12,000,000

$ 45,000,000

Stockholders' Equity [Abstract]

Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax

1,000,000

2,000,000

Senior Notes

135,000,000

287,000,000

Capital Lease Obligations

1,000,000

1,000,000

Long-term Debt, Gross

$ 383,000,000

535,000,000

Stock Repurchased During Period, Shares

1,100

Stock Repurchased and Retired During Period, Value

$ 45,000,000

Treasury Stock Acquired, Average Cost Per Share

$ 42.43

Treasury Stock Acquired, Repurchase Authorization

45

Accumulated Other Comprehensive Income (Loss), Net of Tax

$ (111,000,000)

(12,000,000)

$ (122,000,000)

$ (55,000,000)

Repayments of Long-term Debt

153,000,000

$ 11,000,000

Senior Notes [Member]

Stockholders' Equity [Abstract]

Repayments of Long-term Debt

$ 153,000,000

Subsequent Event [Member]

Stockholders' Equity [Abstract]

Preferred Stock, Tender Offer

$ 144,000,000

Dividends, Preferred Stock, Cash

0.49375

Dividends, Preferred Stock, Cash

$ 3,000,000