Debt (Debt With A Contractual Term Greater Than One Year) (Detail) - USD ($) $ in Thousands	Sep. 25, 2016	Dec. 31, 2015	Sep. 27, 2015
Debt Instrument [Line Items]
Gross long-term debt	$ 5,870,761	$ 5,670,818	$ 5,926,533
Less: current portion of long-term debt, net of unamortized discount and issuance costs	(700,152)	(838,349)	(885,889)
Long-term debt, net	5,170,609	4,832,469	5,040,644
Secured Debt
Debt Instrument [Line Items]
Less: unamortized discount and debt issuance costs	(1,920)	(3,777)	(4,699)
Gross long-term debt	1,066,107	1,613,216	1,860,444
Secured Debt \| Asset-backed Canadian commercial paper conduit facility
Debt Instrument [Line Items]
Long-term debt, gross	140,488	153,839	158,712
Secured Debt \| Term asset-backed securitization debt
Debt Instrument [Line Items]
Long-term debt, gross	927,539	1,463,154	1,706,431
Unsecured Debt
Debt Instrument [Line Items]
Less: unamortized discount and debt issuance costs	(22,834)	(21,106)	(21,869)
Unsecured Debt \| 3.88% Medium-term notes due in 2016 par value
Debt Instrument [Line Items]
Long-term debt, gross	$ 0	$ 450,000	$ 450,000
Debt instrument, stated percentage	3.88%	3.88%	3.88%
Unsecured Debt \| 2.70% Medium-term notes due in 2017 par value
Debt Instrument [Line Items]
Long-term debt, gross	$ 400,000	$ 400,000	$ 400,000
Debt instrument, stated percentage	2.70%	2.70%	2.70%
Unsecured Debt \| 1.55% Medium-term notes due in 2017 par value
Debt Instrument [Line Items]
Long-term debt, gross	$ 400,000	$ 400,000	$ 400,000
Debt instrument, stated percentage	1.55%	1.55%	1.55%
Unsecured Debt \| 6.80% Medium-term notes due in 2018 par value
Debt Instrument [Line Items]
Long-term debt, gross	$ 877,488	$ 878,708	$ 887,958
Debt instrument, stated percentage	6.80%	6.80%	6.80%
Unsecured Debt \| 2.40% Medium-term notes due in 2019 par value
Debt Instrument [Line Items]
Long-term debt, gross	$ 600,000	$ 600,000	$ 600,000
Debt instrument, stated percentage	2.40%	2.40%	2.40%
Unsecured Debt \| 2.25% Medium-term notes due in 2019 par value
Debt Instrument [Line Items]
Long-term debt, gross	$ 600,000	$ 0	$ 0
Debt instrument, stated percentage	2.25%	2.25%	2.25%
Unsecured Debt \| 2.15% Medium-term notes due in 2020 par value
Debt Instrument [Line Items]
Long-term debt, gross	$ 600,000	$ 600,000	$ 600,000
Debt instrument, stated percentage	2.15%	2.15%	2.15%
Unsecured Debt \| 2.85% Medium-term notes due in 2021 par value
Debt Instrument [Line Items]
Long-term debt, gross	$ 600,000	$ 0	$ 0
Debt instrument, stated percentage	2.85%	2.85%	2.85%
Unsecured Debt \| 3.50% Senior unsecured notes due in 2025 par value
Debt Instrument [Line Items]
Long-term debt, gross	$ 450,000	$ 450,000	$ 450,000
Debt instrument, stated percentage	3.50%	3.50%	3.50%
Unsecured Debt \| 4.625% Senior unsecured notes due in 2045 par value
Debt Instrument [Line Items]
Long-term debt, gross	$ 300,000	$ 300,000	$ 300,000
Debt instrument, stated percentage	4.625%	4.625%	4.625%

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of unamortized debt discount (premium) and debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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