Derivative and Hedging Activities - Narrative (Details)													3 Months Ended	12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2013 Senior Notes USD ($)	Dec. 31, 2013 Multi-Counterparty Hedging Facility USD ($) counterparty	Dec. 31, 2013 Multi-Counterparty Hedging Facility Credit Risk counterparty	Dec. 31, 2013 Multi-Counterparty Hedging Facility Energy Related Derivative [Member] MMBoe	Dec. 31, 2013 Multi-Counterparty Hedging Facility Semi-Annual Collateral Dates	Dec. 31, 2013 Multi-Counterparty Hedging Facility Between Semi-Annual Collateral Dates	Dec. 31, 2013 Price Risk Derivative [Member] Multi-Counterparty Hedging Facility MMBoe	Dec. 31, 2013 Basis Derivative [Member] Multi-Counterparty Hedging Facility MMBoe	Dec. 31, 2013 6.25% Euro-Denominated Senior Notes Due 2017 Senior Notes USD ($)	Dec. 31, 2012 6.25% Euro-Denominated Senior Notes Due 2017 Senior Notes USD ($)	Jun. 30, 2011 6.25% Euro-Denominated Senior Notes Due 2017 Senior Notes Cross Currency Interest Rate Contract [Member] EUR (€)	Dec. 31, 2013 6.25% Euro-Denominated Senior Notes Due 2017 Senior Notes Cross Currency Interest Rate Contract [Member] USD ($)	Dec. 31, 2012 6.25% Euro-Denominated Senior Notes Due 2017 Senior Notes Cross Currency Interest Rate Contract [Member] USD ($)	Dec. 31, 2006 6.25% Euro-Denominated Senior Notes Due 2017 Senior Notes Cross Currency Interest Rate Contract [Member] USD ($)	Dec. 31, 2006 6.25% Euro-Denominated Senior Notes Due 2017 Senior Notes Cross Currency Interest Rate Contract [Member] EUR (€)	Dec. 31, 2013 6.25% Euro-Denominated Senior Notes Due 2017 Senior Notes Cross Currency Interest Rate Contract [Member] Maturity Payment [Member] USD ($)	Dec. 31, 2013 6.25% Euro-Denominated Senior Notes Due 2017 Senior Notes Cross Currency Interest Rate Contract [Member] Maturity Payment [Member] EUR (€)
Derivative [Line Items]
Number of counterparties in hedge facility				16	16
Multi-counterparty hedging facility, committed to provide a trading capacity (in tcfe)						1,063,000,000
Multi-counterparty hedge facility, committed to provide an aggregate mark-to-market capacity				$ 17,000,000,000
Multi-counterparty hedge facility, hedged total (in tcfe)									221,000,000	12,000,000
Natural gas and oil proved reserves, the value of which must cover the fair value of the transactions outstanding under the facility, multiplier							1.65	1.30
Duration gains will be recognized on terminated qualifying interest rate derivative transactions, years	7 years
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	14,000,000
Debt Instrument, Face Amount																	600,000,000
Debt Instrument, Interest Rate, Stated Percentage														6.25%		6.25%	6.25%
Debt Instrument, Increase (Decrease), Net													256,000,000
Semi Annual Interest Rate Swap Payments By Counterparty														11,000,000					344,000,000
Semi Annual Interest Rate Swap Payments By Chesapeake														17,000,000				459,000,000
Dollar Equivalent Interest Rate														7.491%
Derivative, Forward Exchange Rate														1.3743	1.3193	1.3325
Liability commodity contracts														2,000,000
Euro-denominated debt in notes payable, adjusted value	12,886,000,000	12,620,000,000	2,300,000,000								473,000,000	454,000,000		473,000,000
Derivative Instruments, Gain (Loss) Reclassification from AOCI to Income, Estimated Net Amount to be Transferred	159,000,000
Cash Flow Hedges, Accumulated OCI Balance	167,000,000
Expected amount to be transferred of during the next 12 months	$ 23,000,000
Derivative, Number of Instruments Held	0