Business Combinations and Divestitures (Acquisitions) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended	6 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014	Jun. 30, 2014	May 31, 2012	Dec. 31, 2011	Apr. 30, 2014
Business Acquisition [Line Items]
Capital Expenditures for Property, Plant and Equipment	$ (18)	$ 8	$ 165
Acquisitions	6	2
Joint Venture in China [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of voting interests acquired								30.00%
Capital Expenditures for Property, Plant and Equipment					13
Ownership percentage before acquisition of additional ownership interest								45.00%
Ownership percentage of joint venture after acquisition				75.00%	75.00%
Business combination, remeasurement gain					16
Acquisitions					6
Cash acquired from acquisition				30
Company that Designs and Produces Well Completion Tools [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross						29
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares						3
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned						39
Business Combination, Consideration Transferred, Liabilities Incurred						16
Business Combination, Contingent Consideration, Liability	3
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Capital Expenditures for Property, Plant and Equipment							$ 144