Description of Business and Basis of Presentation - Additional Information (Detail) (USD $)	1 Months Ended			6 Months Ended
	Apr. 02, 2013	Dec. 18, 2012	Dec. 20, 2012	Jun. 30, 2013
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
General partnership interest	2.00%		2.00%	50.00%
Common stock, par value	$ 39.86	$ 32.15
Gross offering proceeds	$ 400,100,000	$ 569,300,000
Capital contribution from Partnerships' general partner	8,400,000
Partners' capital account, sale of units			712,100,000
Subordinated Units
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Partnership units outstanding				34,538,061
General Partner
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Partnership units outstanding				2,042,458
General partnership interest				1.00%
Common Units
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Common stock, shares issued	10,350,000	18,400,000
Underwriters Overallotment Option
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Common stock, shares issued	1,350,000	2,400,000
Convertible Class B Units
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Partnership units outstanding				6,080,365
Partners' capital account units, sale of units			5,900,000
Subordinated Class C Units
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Partnership units outstanding				5,599,634
Partners' capital account units, sale of units			5,600,000
Chesapeake Midstream Operating, L.L.C.
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of equity interest acquired				100.00%
Consideration paid for acquisition				2,160,000,000
Chesapeake Midstream Operating, L.L.C. | Gas Gathering Agreement
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Pipeline area covered				4,300,000
Pipeline				1,675
Chesapeake Midstream Operating, L.L.C. | Gas Gathering Agreement | Minimum
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Term of agreements associated with assets				10 years
Chesapeake Midstream Operating, L.L.C. | Gas Gathering Agreement | Maximum
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Term of agreements associated with assets				20 years
Williams Acquisition
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
General partnership interest				50.00%
Williams Acquisition | Subordinated Units
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Partnership units outstanding				34,538,061
Williams Acquisition | General Partner
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Consideration paid for acquisition				$ 1,800,000,000
GIP I Entities and GIP II
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Partnership units outstanding				2,042,458
General partnership interest				50.00%
Limited partnership interest				39.10%
GIP I Entities and GIP II | Subordinated Units
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Partnership units outstanding				34,538,061
GIP I Entities and GIP II | General Partner
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
General partnership interest				1.00%
GIP I Entities and GIP II | Common Units
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Partnership units outstanding				33,704,666
GIP I Entities and GIP II | Convertible Class B Units
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Partnership units outstanding				6,080,365
GIP I Entities and GIP II | Subordinated Class C Units
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Partnership units outstanding				5,599,634
Aggregate
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Limited partnership interest				22.60%
Publicly Owned
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Limited partnership interest				36.30%
Publicly Owned | Common Units
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Partnership units outstanding				74,020,115