Borrowing Arrangements - Credit Agreement (Details)	1 Months Ended
	Nov. 30, 2022 USD ($) performance_indicator_metric qtr	Oct. 31, 2021 USD ($)	Jan. 31, 2020 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2015 USD ($)	Jan. 31, 2024 USD ($)
Senior Notes
Debt Instrument [Line Items]
Debt redemption percentage of principle amount					101.00%
2021 Notes | Senior Notes
Debt Instrument [Line Items]
Principal amount		$ 1,000,000,000				$ 1,000,000,000
Stated interest rate		2.40%
Unamortized discount		$ 3,000,000
Debt issuance costs		9,000,000
Proceeds from debt, net of issuance costs		$ 988,000,000
2020 Notes | Senior Notes
Debt Instrument [Line Items]
Principal amount			$ 500,000,000			500,000,000
Stated interest rate			2.85%
Unamortized discount			$ 1,000,000
Debt issuance costs			5,000,000
Proceeds from debt, net of issuance costs			494,000,000
Debt Due June 15, 2020 | Senior Notes
Debt Instrument [Line Items]
Repayments of debt			$ 450,000,000
2017 Notes | Senior Notes
Debt Instrument [Line Items]
Principal amount				$ 500,000,000		500,000,000
Stated interest rate				3.50%
Unamortized discount				$ 3,000,000
Debt issuance costs				5,000,000
Proceeds from debt, net of issuance costs				492,000,000
Senior Notes Due December 15, 2017 | Senior Notes
Debt Instrument [Line Items]
Repayments of debt				$ 400,000,000
2015 Notes | Senior Notes
Debt Instrument [Line Items]
Principal amount					$ 300,000,000	300,000,000
Stated interest rate					4.375%
Unamortized discount					$ 1,000,000
Debt issuance costs					3,000,000
Proceeds from debt, net of issuance costs					$ 296,000,000
Revolving credit facility | The Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,500,000,000
Line of credit facility, increase limit	$ 2,000,000,000
Debt covenant, leverage ratio, maximum	3.50
Debt covenant, leverage ration following consummation of certain acquisitions (up to)	4.00
Debt covenant, leverage ration following consummation of certain acquisitions, number of consecutive quarters | qtr	4
Period for issuance of audited consolidated financial statements	90 days
Debt interest rates adjustment, number of key performance indicator metrics | performance_indicator_metric	2
Line of credit facility, outstanding borrowings						$ 0
Revolving credit facility | The Credit Agreement | Minimum | Base rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.00%
Revolving credit facility | The Credit Agreement | Minimum | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate	0.785%
Revolving credit facility | The Credit Agreement | Maximum | Base rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.375%
Revolving credit facility | The Credit Agreement | Maximum | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate	1.375%