Share Owners' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Increase (Decrease) in Share Owners' Equity
Balance		$ 416	$ 363	$ 279
Issuance of common stock				$ 5
Issuance of common stock (in shares)				504,635
Reissuance of common stock		$ 3	$ 5	$ 7
Reissuance of common stock (in shares)	101,687	49,234	201,165	183,836
Stock compensation		$ 4	$ 8	$ 9
Net earnings	$ 143	109	196	182
Other comprehensive income (loss)		(74)	207	(24)
Balance	$ 779	$ 458	$ 779	$ 458
Common Stock, Number of Shares, Par Value and Other Disclosures
Common stock, shares authorized	250,000,000		250,000,000
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01
Shares of common stock issued (including treasury shares)	185,692,000	185,417,000	185,692,000	185,417,000	185,355,000
Treasury stock, shares	22,816,000	23,335,000	22,816,000	23,335,000	23,017,000
Common Stock
Increase (Decrease) in Share Owners' Equity
Balance	$ 2	$ 2	$ 2	$ 2
Balance	2	2	2	2
Capital in Excess of Par Value
Increase (Decrease) in Share Owners' Equity
Balance	3,083	3,074	3,080	3,064
Issuance of common stock				5
Stock compensation	5	4	8	9
Balance	3,088	3,078	3,088	3,078
Treasury Stock
Increase (Decrease) in Share Owners' Equity
Balance	(557)	(569)	(560)	(573)
Reissuance of common stock	2	3	5	7
Balance	(555)	(566)	(555)	(566)
Retained Earnings (Loss)
Increase (Decrease) in Share Owners' Equity
Balance	(48)	(238)	(96)	(305)
Net earnings	140	105	188	172
Balance	92	(133)	92	(133)
Accumulated Other Comprehensive Loss.
Increase (Decrease) in Share Owners' Equity
Balance	(1,981)	(1,971)	(2,172)	(2,017)
Other comprehensive income (loss)	24	(62)	215	(16)
Balance	(1,957)	(2,033)	(1,957)	(2,033)
Non-controlling Interests
Increase (Decrease) in Share Owners' Equity
Balance	116	118	109	108
Net earnings	3	4	8	10
Other comprehensive income (loss)	(10)	(12)	(8)	(8)
Balance	$ 109	$ 110	$ 109	$ 110