Pension and Postretirement Benefit Plans and Defined Contribution Plans - Long-term Target Asset Allocations Ranges and the Percentage of the Fair Value of Plan Assets (Detail)	Dec. 31, 2023
Minimum [Member] | U.S. [Member] | Cash and cash equivalents [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	0.00%
Minimum [Member] | U.S. [Member] | Cash and cash equivalents [Member] | Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	0.00%
Minimum [Member] | U.S. [Member] | Equity securities [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	10.00%
Minimum [Member] | U.S. [Member] | Fixed income securities [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	45.00%
Minimum [Member] | U.S. [Member] | Other investments [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	5.00%
Minimum [Member] | U.S. [Member] | Insurance contracts [Member] | Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	95.00%
Minimum [Member] | International [Member] | Cash and cash equivalents [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	0.00%
Minimum [Member] | International [Member] | Equity securities [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	10.00%
Minimum [Member] | International [Member] | Fixed income securities [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	45.00%
Minimum [Member] | International [Member] | Other investments [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	15.00%
Maximum [Member] | U.S. [Member] | Cash and cash equivalents [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	10.00%
Maximum [Member] | U.S. [Member] | Cash and cash equivalents [Member] | Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	5.00%
Maximum [Member] | U.S. [Member] | Equity securities [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	40.00%
Maximum [Member] | U.S. [Member] | Fixed income securities [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	80.00%
Maximum [Member] | U.S. [Member] | Other investments [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	35.00%
Maximum [Member] | U.S. [Member] | Insurance contracts [Member] | Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	100.00%
Maximum [Member] | International [Member] | Cash and cash equivalents [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	10.00%
Maximum [Member] | International [Member] | Equity securities [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	20.00%
Maximum [Member] | International [Member] | Fixed income securities [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	70.00%
Maximum [Member] | International [Member] | Other investments [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	35.00%