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Shareholders' Equity (Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (876)	$ (740)
Other comprehensive income adjustments before reclassifications	1	(171)
Amounts reclassified from accumulated other comprehensive income	44	35
Ending balance	(831)	(876)
Accrued dividends	12	12
Accumulated foreign currency translation adjustments, net of tax of $1, $4 and $0			$ (269)	$ (203)	$ (131)
Pension and post-retirement benefits, net of tax of $209, $231 and $221			(560)	(670)	(608)
Changes in fair value of derivatives, net of tax of $0, $0 and $0			(2)	(3)	(1)
Total accumulated other comprehensive loss	(876)	(740)	(831)	(876)	(740)
Cumulative translation adjustments, tax			1	4	0
Pension liability adjustments, tax			209	231	221
Unrealized gains (losses) on derivatives, tax			0	0	0
Accumulated foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(203)	(131)
Other comprehensive income adjustments before reclassifications	(70)	(73)
Amounts reclassified from accumulated other comprehensive income	4	1
Ending balance	(269)	(203)
Total accumulated other comprehensive loss	(203)	(131)	(269)	(203)	(131)
Pension and post-retirement benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(670)	(608)
Other comprehensive income adjustments before reclassifications	71	(96)
Amounts reclassified from accumulated other comprehensive income	39	34
Ending balance	(560)	(670)
Total accumulated other comprehensive loss	(670)	(608)	(560)	(670)	(608)
Changes in fair value of derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(3)	(1)
Other comprehensive income adjustments before reclassifications	0	(2)
Amounts reclassified from accumulated other comprehensive income	1	0
Ending balance	(2)	(3)
Total accumulated other comprehensive loss	$ (3)	$ (1)	$ (2)	$ (3)	$ (1)

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The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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