Commitments and Contingencies (Detail)	Dec. 31, 2021 USD ($) claim	Sep. 30, 2021
Other Commitments [Line Items]
Number of pending claims | claim	0
Severance payment percent, scenario one	100.00%
Severance payment percent, scenario two	200.00%
Severance payment percent, scenario three	200.00%
Indemnification of officers and directors
Other Commitments [Line Items]
Liabilities under guarantor agreements	$ 0
General indemnification
Other Commitments [Line Items]
Liabilities under guarantor agreements	0
Indemnification of business partners
Other Commitments [Line Items]
Liabilities under guarantor agreements	0
Service level credits agreement
Other Commitments [Line Items]
Liabilities under guarantor agreements	0
Capital expenditures
Other Commitments [Line Items]
Purchase commitments	1,000,000,000
Miscellaneous purchase commitments
Other Commitments [Line Items]
Purchase commitments	$ 1,300,000,000
EMEA 2 Joint Venture
Other Commitments [Line Items]
Ownership Percentage		20.00%
EMEA 2 Joint Venture | Variable Interest Entity, Not Primary Beneficiary
Other Commitments [Line Items]
Ownership Percentage	20.00%
EMEA 2 Joint Venture | Variable Interest Entity, Not Primary Beneficiary | EMEA 2 Joint Venture Credit Facility
Other Commitments [Line Items]
Maximum borrowing capacity	$ 1,400,000,000
Percentage guarantee on debt payments	0.20
Maximum guarantee under credit facility arrangement	$ 310,800,000
Maximum future payments under debt guarantees	$ 38,100,000