Share Owners' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Increase (Decrease) in Share Owners' Equity
Balance	$ 779	$ 458	$ 363	$ 279
Issuance of common stock				$ 5
Issuance of common stock (in shares)				505,471
Reissuance of common stock	$ 2	$ 3	$ 7	$ 10
Reissuance of common stock (in shares)	85,290	114,039	286,455	297,875
Stock compensation	$ 5		$ 13	$ 9
Net earnings	133	$ 114	329	296
Other comprehensive income (loss)	20	(59)	227	(83)
Acquisitions of noncontrolling interest		(1)		(1)
Balance	$ 939	$ 515	$ 939	$ 515
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)	185,722,000	185,418,000	185,722,000	185,418,000	185,355,000
Treasury stock, shares	22,731,000	23,221,000	22,731,000	23,221,000	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	3,088	3,078	3,080	3,064
Issuance of common stock				5
Stock compensation	5		13	9
Acquisitions of noncontrolling interest		(1)		(1)
Balance	3,093	3,077	3,093	3,077
Treasury Stock
Increase (Decrease) in Share Owners' Equity
Balance	(555)	(566)	(560)	(573)
Reissuance of common stock	2	3	7	10
Balance	(553)	(563)	(553)	(563)
Retained Earnings (Loss)
Increase (Decrease) in Share Owners' Equity
Balance	92	(133)	(96)	(305)
Net earnings	126	108	314	280
Balance	218	(25)	218	(25)
Accumulated Other Comprehensive Loss.
Increase (Decrease) in Share Owners' Equity
Balance	(1,957)	(2,033)	(2,172)	(2,017)
Other comprehensive income (loss)	19	(57)	234	(73)
Balance	(1,938)	(2,090)	(1,938)	(2,090)
Non-controlling Interests
Increase (Decrease) in Share Owners' Equity
Balance	109	110	109	108
Net earnings	7	6	15	16
Other comprehensive income (loss)	1	(2)	(7)	(10)
Balance	$ 117	$ 114	$ 117	$ 114