Commitments and Contingencies (Details 3) (USD $) In Millions, unless otherwise specified						12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 South America Africa the Middle East and Asia Excluding Colombia	Dec. 31, 2013 COLOMBIA	Mar. 31, 2013 Mexico	Dec. 31, 2013 Mexico Minimum	Dec. 31, 2013 Mexico Maximum
Income tax contingencies
Aggregate remaining amounts assessed or expected to assessed range						$ 30	$ 35
Reduction in reserves					20
Employer's liability claims subject to per-occurrence deductible	2.0
Workers automobile claims	1.0
General liability claims subject to per-occurrence deductible	5.0
Deductions in land rigs and for offshore rigs	5.0
Political risk insurance losses deductible			0.25
Political risk insurance deductible for foreign operation				0.5
Self-insurance accruals	181.7	171.2
Self-insurance recoveries/receivables	$ 44.7	$ 24.6