Earnings Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]
Net income from continuing operations	$ 220,000,000	$ 136,000,000	$ 342,000,000	$ 283,000,000
Net income attributable to noncontrolling interests	12,000,000	0	17,000,000	0
Net income from continuing operations attributable to Cameron	208,000,000	136,000,000	325,000,000	283,000,000
Income from discontinued operations, net of taxes	13,000,000	4,000,000	7,000,000	6,000,000
Net income attributable to Cameron stockholders	221,000,000	140,000,000	332,000,000	289,000,000
Average shares outstanding (basic) (in shares)	204,000,000	247,000,000	209,000,000	247,000,000
Common stock equivalents (in shares)	1,000,000	1,000,000	2,000,000	2,000,000
Diluted shares (in shares)	205,000,000	248,000,000	211,000,000	249,000,000
Basic earnings (loss) per share [Abstract]
Continuing operations (in dollars per share)	$ 1.02	$ 0.55	$ 1.55	$ 1.15
Discontinued operations (in dollars per share)	$ 0.06	$ 0.02	$ 0.04	$ 0.02
Basic (in dollars per share)	$ 1.08	$ 0.57	$ 1.59	$ 1.17
Diluted earnings (loss) per share [Abstract]
Continuing operations (in dollars per share)	$ 1.02	$ 0.55	$ 1.54	$ 1.14
Discontinued operations (in dollars per share)	$ 0.06	$ 0.02	$ 0.04	$ 0.02
Diluted (in dollars per share)	$ 1.08	$ 0.57	$ 1.58	$ 1.16
Treasury Shares [Roll Forward]
Treasury shares at beginning of period (in shares)	56,109,636	15,768,832	41,683,164	16,415,336
Purchase of treasury shares (in shares)	4,516,668	1,500,002	19,673,771	2,113,455
Net change in treasury shares owned by participants in nonqualified deferred compensation plans (in shares)	(1,614)	(1,068)	38,148	52,107
Treasury shares issued in satisfaction of stock option exercises and vesting of restricted stock units (in shares)	(597,340)	(266,036)	(1,367,733)	(1,579,168)
Treasury shares at end of period (in shares)	60,027,350	17,001,730	60,027,350	17,001,730
Average cost of treasury shares acquired (in dollars per share)	$ 63.00	$ 60.93	$ 61.37	$ 61.77
Stock repurchase, authorized amount	3,200,000,000		3,200,000,000
Remaining authority for future stock purchase	$ 456,000,000		$ 456,000,000