Pension and Other Benefit Programs Pension and Other Benefit Programs (Narrative) (Details) (USD $)	2 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014 participant	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate		4.50%
2014		$ 10,000,000
Defined Benefit Plan, Participants		2,725
Settlement Participants		935
Percentage of Participants, Settlement Acceptance		0.34
Defined Benefit Plan, Settlements, Plan Assets		55,000,000
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments		4,000,000
Document Period End Date		Dec. 31, 2014
Defined Contribution Plan, Employer Matching Contribution of Eligible Employee Contributions, Percent		100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		6.00%	5.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount		20,000,000	2,000,000
Defined Contribution Plan, Cost Recognized		5,000,000	4,000,000	4,000,000
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	412,000,000	516,000,000	412,000,000
Company contributions		51,000,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Match		100.00%
Defined Benefit Plan, Net Periodic Benefit Cost
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.60%	3.80%	4.60%
Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefits paid	3,000,000	(16,000,000)
Defined Benefit Plan, Net Periodic Benefit Cost	9,000,000		1,000,000
Anticipated Medicare Subsidy Receipts		12,000,000
US Operations SESP [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		6.00%
US Operations SERP
Defined Benefit Plan Disclosure [Line Items]
Cash Surrender Value of Life Insurance	51,000,000	54,000,000	51,000,000
Benefits paid	0	(11,000,000)
UK Operations SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		7.00%
US and UK Operations SESP [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	2,000,000
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	23,000,000	13,000,000	23,000,000
ICE Historical US Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions		$ 4,000,000	$ 3,000,000	$ 2,000,000
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations		65.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations		35.00%
Minimum [Member] | ICE Historical Subsidiaries [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	10.00%
Maximum [Member] | ICE Historical Subsidiaries [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	20.00%